For use with unjacketed cylindrical reaction vessels with a 200mm ID or 300mm ID flange. Coil can be used to cool or heat the contents of a vessel. Fabricated from #304 S.S. tubing with a green PFA coating that is electrically tested to insure complete coverage. This method of manufacture provides for excellent heat transfer and avoids the problems normally associated with heat-shrink PTFE tubing on copper tubing.